Unlike most bacteria, Mycoplasma do not have a rigid cell wall, making them highly adaptable and difficult to eliminate. Several species cause diseases in humans—including atypical pneumonia and pelvic infections—and are a common threat to the purity of laboratory cell lines. https://xelleratherapeutics.hashnode.dev/mycoplasma-a-hidden-threat-in-cell-culture-and-biopharmacutical-research